Re: [Elecraft] Antenna Quandary
They are known to radiate 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County Richard wrote on 5/11/2022 1:58 PM: Anybody out there super-well versed in the behavior of the half-wave dipole? Cheers, Richard Kunc W4KBX __ Elecraft mailing list Home:http://mailman.qth.net/mailman/listinfo/elecraft Help:http://mailman.qth.net/mmfaq.htm Post:mailto:Elecraft@mailman.qth.net This list hosted by:http://www.qsl.net Please help support this email list:http://www.qsl.net/donate.html Message delivered tok6dg...@gmail.com -- This email has been checked for viruses by AVG. https://www.avg.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
*"On the other hand, cutting the guy some slack is ok too. This is a tough room but the only dumb question is the one you don’t ask."* I dunno... "Is the Pink Panther a lion" is up there in essential dumbitude. https://youtu.be/J0UVlPmhY0A 73, Gwen, NG3P On Wed, May 11, 2022, 10:20 PM Lou Laderman via Elecraft < elecraft@mailman.qth.net> wrote: > On the other hand, cutting the guy some slack is ok too. This is a tough > room but the only dumb question is the one you don’t ask. > > 73, Lou W0FK > > Lou Laderman > Sent from my mobile device > > On May 11, 2022, at 9:09 PM, Edward Mccann wrote: > > Entirely possible this is a late April Fool’s query, or a freshman > fraternity prank designed to bring out the blowhards who will profess > knowledge of most things. > > When and if the query is expanded to source commentary from those > “super-well versed” in the behavior of the OCFD, from under the rock will > come more than you ever bargained for. > > 73, > > Ed McCann > AG6CX > > Sent from my iPhone > > On May 11, 2022, at 6:39 PM, Andy Durbin wrote: > > "Anybody out there super-well versed in the behavior of the half-wave > dipole?" > > There are only two possible answers: > > Yes > No > > I speculate that, given the expertise of this group, "Yes" is the right > answer. However, I have no clue how the answer to your question will be > useful to you. > > I suppose the resulting answers may be more informative than "why didn't > my package carrier meet my expectations?". > > Andy, k3wyc > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to edwmcc...@gmail.com > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to llader...@icloud.com > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to ard...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
On 5/11/2022 10:20 PM, Jim Brown wrote: Low dipoles are closer to 50 ohms, high dipoles are closer to 75 ohms. Low would be much less than a quarter wave, high would be much more than a quarter wave. BTW -- there are a couple of very useful graphics that help understand this at the beginning of Chapter 8 of ON4UN's "Low Band DXing," another great antenna book published by ARRL. One shows the ground reflection as a mirror, the other, paragraph 1.3.1 in my 20 year old edition, shows how feedpoint R and X vary with height for an 80M dipole. Ground conductivity is not shown, so I'm guessing it's computed for average ground. And I agree with W4TV about the usefulness of the Antenna Book. I contribute both to it and to the Handbook. These three ARRL books have been central to my learning, in some ways, at least as important as my EE education. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
On 5/11/2022 1:56 PM, Richard wrote: Anybody out there super-well versed in the behavior of the half-wave dipole? You do have a copy of the ARRL Handbook, don't you? Every ham should have one, and there's a lot of tutorial material in it. I'd bet that every single one of those engineers who got us to the moon learned electronics and radio from The Handbook. That said, what's your question? OF COURSE there are LOTS of folks here who know a LOT about half wave dipoles. I have six of them in the air for different bands and directions. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
On the other hand, cutting the guy some slack is ok too. This is a tough room but the only dumb question is the one you don’t ask. 73, Lou W0FK Lou Laderman Sent from my mobile device On May 11, 2022, at 9:09 PM, Edward Mccann wrote: Entirely possible this is a late April Fool’s query, or a freshman fraternity prank designed to bring out the blowhards who will profess knowledge of most things. When and if the query is expanded to source commentary from those “super-well versed” in the behavior of the OCFD, from under the rock will come more than you ever bargained for. 73, Ed McCann AG6CX Sent from my iPhone On May 11, 2022, at 6:39 PM, Andy Durbin wrote: "Anybody out there super-well versed in the behavior of the half-wave dipole?" There are only two possible answers: Yes No I speculate that, given the expertise of this group, "Yes" is the right answer. However, I have no clue how the answer to your question will be useful to you. I suppose the resulting answers may be more informative than "why didn't my package carrier meet my expectations?". Andy, k3wyc __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to edwmcc...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to llader...@icloud.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
Concur. Slack reasonable cut. No dumb questions, just dumb answers, from time to time. But I’m amazed at the restraint shown by many who are avoiding the tithe of arms-appointed expert, especially when we have a passel of Big Swinging Dudes on the line. The query might have been a bit more foucssed, or tailored to the K line. But maybe Santa Cruz has a proprietary dipole in the back room I missed. 73, Ed McCann AG6CX Sent from my iPhone On May 11, 2022, at 7:37 PM, Gwen Patton wrote: *"On the other hand, cutting the guy some slack is ok too. This is a tough room but the only dumb question is the one you don’t ask."* I dunno... "Is the Pink Panther a lion" is up there in essential dumbitude. https://youtu.be/J0UVlPmhY0A 73, Gwen, NG3P On Wed, May 11, 2022, 10:20 PM Lou Laderman via Elecraft < elecraft@mailman.qth.net> wrote: > On the other hand, cutting the guy some slack is ok too. This is a tough > room but the only dumb question is the one you don’t ask. > > 73, Lou W0FK > > Lou Laderman > Sent from my mobile device > > On May 11, 2022, at 9:09 PM, Edward Mccann wrote: > > Entirely possible this is a late April Fool’s query, or a freshman > fraternity prank designed to bring out the blowhards who will profess > knowledge of most things. > > When and if the query is expanded to source commentary from those > “super-well versed” in the behavior of the OCFD, from under the rock will > come more than you ever bargained for. > > 73, > > Ed McCann > AG6CX > > Sent from my iPhone > > On May 11, 2022, at 6:39 PM, Andy Durbin wrote: > > "Anybody out there super-well versed in the behavior of the half-wave > dipole?" > > There are only two possible answers: > > Yes > No > > I speculate that, given the expertise of this group, "Yes" is the right > answer. However, I have no clue how the answer to your question will be > useful to you. > > I suppose the resulting answers may be more informative than "why didn't > my package carrier meet my expectations?". > > Andy, k3wyc > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to edwmcc...@gmail.com > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to llader...@icloud.com > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to ard...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to edwmcc...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
I wish I knew as much about half wave dipoles as I think I do. Hank K4HYJ > On May 11, 2022, at 10:52 PM, Edward Mccann wrote: > > Concur. > > Slack reasonable cut. > > No dumb questions, just dumb answers, from time to time. > > But I’m amazed at the restraint shown by many who are avoiding the tithe of > arms-appointed expert, especially when we have a passel of Big Swinging Dudes > on the line. > > The query might have been a bit more foucssed, or tailored to the K line. But > maybe Santa Cruz has a proprietary dipole in the back room I missed. > > 73, > > Ed McCann > AG6CX > > Sent from my iPhone > > On May 11, 2022, at 7:37 PM, Gwen Patton wrote: > > *"On the other hand, cutting the guy some slack is ok too. This is a tough > room but the only dumb question is the one you don’t ask."* > > I dunno... "Is the Pink Panther a lion" is up there in essential dumbitude. > > https://youtu.be/J0UVlPmhY0A > > 73, > Gwen, NG3P > >> On Wed, May 11, 2022, 10:20 PM Lou Laderman via Elecraft < >> elecraft@mailman.qth.net> wrote: >> >> On the other hand, cutting the guy some slack is ok too. This is a tough >> room but the only dumb question is the one you don’t ask. >> >> 73, Lou W0FK >> >> Lou Laderman >> Sent from my mobile device >> >> On May 11, 2022, at 9:09 PM, Edward Mccann wrote: >> >> Entirely possible this is a late April Fool’s query, or a freshman >> fraternity prank designed to bring out the blowhards who will profess >> knowledge of most things. >> >> When and if the query is expanded to source commentary from those >> “super-well versed” in the behavior of the OCFD, from under the rock will >> come more than you ever bargained for. >> >> 73, >> >> Ed McCann >> AG6CX >> >> Sent from my iPhone >> >> On May 11, 2022, at 6:39 PM, Andy Durbin wrote: >> >> "Anybody out there super-well versed in the behavior of the half-wave >> dipole?" >> >> There are only two possible answers: >> >> Yes >> No >> >> I speculate that, given the expertise of this group, "Yes" is the right >> answer. However, I have no clue how the answer to your question will be >> useful to you. >> >> I suppose the resulting answers may be more informative than "why didn't >> my package carrier meet my expectations?". >> >> Andy, k3wyc >> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to edwmcc...@gmail.com >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to llader...@icloud.com >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to ard...@gmail.com > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to edwmcc...@gmail.com > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to h...@optilink.us __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
On 5/11/2022 6:51 PM, Richard wrote: Jim — I just finished building a half-wave 40-meter dipole and have it nicely tuned for the middle of the SSB segment. Out of necessity, the tuning process was carried out with the antenna horizontal. Feedpoint Z of horizontal antennas is slightly affected by height and surrounding objects, so ideally should be tune at the rigged height, then lowered and re-adjusted if necessary. *QUESTION 1:* Should I ever hang this antenna as an inverted V, would that result in a significant change to the location of the sweet spot? Slightly. When we finally got the leg lengths to the point where the SSB sweet spot was damn near perfect, we had folded back 30 inches of excess leg wire on each leg. The excess was not twisted around the legs but instead laid parallel to the leg wires and Gorilla taped in place in several places. Remember that SWR is NOT a measure of antenna performance, it only tells us approximately where it is resonant. That's because the feedpoint impedance varies a bit with height, thanks to the reflection from the ground coupling back to the antenna. Folding it back as you have done is perfectly good technique -- the antenna ends at the fold (that is, where it goes through the insulator. We routinely do that when rigging new wires. *QUESTION B:* I’d like to cut off 12 of the 30 inches of excess wire, leaving 18 inches in case I or some future owner wants to retune down to the CW segment. Will shortening the excess wire from 30 to 18 inches influence the sweet spot? SWR matters two ways. First, the match at the transmitter must be good enough that the transmitter can put full power into it. Additional loss due to SWR doesn't matter much until the SWR gets pretty high unless you're using small diameter coax or it's a long length of coax. As long as you have an antenna tuner (really an adjustable network to match the transmission line to the rig), any SWR below about 2.5:1 is plenty good enough unless the line is long enough, or small enough diameter, to have a lot of loss. That's why smart hams use big coax like RG8 or RG11 to feed dipoles. Low dipoles are closer to 50 ohms, high dipoles are closer to 75 ohms. Low would be much less than a quarter wave, high would be much more than a quarter wave. That feedpoint Z also depends on ground conductivity. SO -- since the full width of 40M is a small as a percentage of the frequency, so a half-wave dipole cut for 7150 will be just fine to cover from 7,000 - 7,300 kHz. Ditto for all the bands above 40M until you hit 10M, but even there, unless you work FM, which is at the top of the band, a dipole tuned to about 28.45 MHz will be "good enough" for where all the action is. BTW -- as study all this stuff and learn to use the tools, there is antenna modeling software that will let you learn by modeling. Here's a study I did several years ago on the effect of antenna height both as text and slides. http://k9yc.com/AntennaPlanning.pdf http://k9yc.com/VertOrHorizontal-Slides.pdf 73, Jim K9YC Looking forward to your input. Cheers. Richard That said, what's your question? OF COURSE there are LOTS of folks here who know a LOT about half wave dipoles. I have six of them in the air for different bands and directions. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
On 2022-05-11 8:02 PM, Jim Brown wrote: > On 5/11/2022 1:56 PM, Richard wrote: >> Anybody out there super-well versed in the behavior of the half-wave >> dipole? > > You do have a copy of the ARRL Handbook, don't you? Every ham should > have one, and there's a lot of tutorial material in it. Two books no amateur's library should be without: the ARRL Handbook and the ARRL Antenna Manual. The Antenna Manual is the far better reference for questions about a half-wave dipole. 73, ... Joe, W4TV On 2022-05-11 8:02 PM, Jim Brown wrote: On 5/11/2022 1:56 PM, Richard wrote: Anybody out there super-well versed in the behavior of the half-wave dipole? You do have a copy of the ARRL Handbook, don't you? Every ham should have one, and there's a lot of tutorial material in it. I'd bet that every single one of those engineers who got us to the moon learned electronics and radio from The Handbook. That said, what's your question? OF COURSE there are LOTS of folks here who know a LOT about half wave dipoles. I have six of them in the air for different bands and directions. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
"Anybody out there super-well versed in the behavior of the half-wave dipole?" There are only two possible answers: Yes No I speculate that, given the expertise of this group, "Yes" is the right answer. However, I have no clue how the answer to your question will be useful to you. I suppose the resulting answers may be more informative than "why didn't my package carrier meet my expectations?". Andy, k3wyc __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
Entirely possible this is a late April Fool’s query, or a freshman fraternity prank designed to bring out the blowhards who will profess knowledge of most things. When and if the query is expanded to source commentary from those “super-well versed” in the behavior of the OCFD, from under the rock will come more than you ever bargained for. 73, Ed McCann AG6CX Sent from my iPhone On May 11, 2022, at 6:39 PM, Andy Durbin wrote: "Anybody out there super-well versed in the behavior of the half-wave dipole?" There are only two possible answers: Yes No I speculate that, given the expertise of this group, "Yes" is the right answer. However, I have no clue how the answer to your question will be useful to you. I suppose the resulting answers may be more informative than "why didn't my package carrier meet my expectations?". Andy, k3wyc __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to edwmcc...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
Mine is well-behaved. On 5/11/2022 1:56 PM, Richard W4KBX wrote: > Anybody out there super-well versed in the behavior of the half-wave dipole? > > Cheers, > > Richard Kunc > W4KBX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
Wa Half wave On Wed, May 11, 2022, 20:09 Hank via Elecraft wrote: > I wish I knew as much about half wave dipoles as I think I do. > > Hank > K4HYJ > > > On May 11, 2022, at 10:52 PM, Edward Mccann wrote: > > > > Concur. > > > > Slack reasonable cut. > > > > No dumb questions, just dumb answers, from time to time. > > > > But I’m amazed at the restraint shown by many who are avoiding the tithe > of arms-appointed expert, especially when we have a passel of Big Swinging > Dudes on the line. > > > > The query might have been a bit more foucssed, or tailored to the K > line. But maybe Santa Cruz has a proprietary dipole in the back room I > missed. > > > > 73, > > > > Ed McCann > > AG6CX > > > > Sent from my iPhone > > > > On May 11, 2022, at 7:37 PM, Gwen Patton wrote: > > > > *"On the other hand, cutting the guy some slack is ok too. This is a > tough > > room but the only dumb question is the one you don’t ask."* > > > > I dunno... "Is the Pink Panther a lion" is up there in essential > dumbitude. > > > > https://youtu.be/J0UVlPmhY0A > > > > 73, > > Gwen, NG3P > > > >> On Wed, May 11, 2022, 10:20 PM Lou Laderman via Elecraft < > >> elecraft@mailman.qth.net> wrote: > >> > >> On the other hand, cutting the guy some slack is ok too. This is a tough > >> room but the only dumb question is the one you don’t ask. > >> > >> 73, Lou W0FK > >> > >> Lou Laderman > >> Sent from my mobile device > >> > >> On May 11, 2022, at 9:09 PM, Edward Mccann wrote: > >> > >> Entirely possible this is a late April Fool’s query, or a freshman > >> fraternity prank designed to bring out the blowhards who will profess > >> knowledge of most things. > >> > >> When and if the query is expanded to source commentary from those > >> “super-well versed” in the behavior of the OCFD, from under the rock > will > >> come more than you ever bargained for. > >> > >> 73, > >> > >> Ed McCann > >> AG6CX > >> > >> Sent from my iPhone > >> > >> On May 11, 2022, at 6:39 PM, Andy Durbin wrote: > >> > >> "Anybody out there super-well versed in the behavior of the half-wave > >> dipole?" > >> > >> There are only two possible answers: > >> > >> Yes > >> No > >> > >> I speculate that, given the expertise of this group, "Yes" is the right > >> answer. However, I have no clue how the answer to your question will be > >> useful to you. > >> > >> I suppose the resulting answers may be more informative than "why didn't > >> my package carrier meet my expectations?". > >> > >> Andy, k3wyc > >> > >> __ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > >> Message delivered to edwmcc...@gmail.com > >> __ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > >> Message delivered to llader...@icloud.com > >> __ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > >> Message delivered to ard...@gmail.com > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to edwmcc...@gmail.com > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to h...@optilink.us > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to n6...@arrl.net __ Elecraft mailing
[Elecraft] K3s Technical Question?
From the programmers Manual: " BR (Serial I/O Baud Rate; SET only) SET format: BRn; where n is 0 (4800 b), 1 (9600 b), 2 (19200 b), or 3 (38400 b). Note: The K3 firmware download utility automatically sets the K3 to 38400 baud for downloads, then restores the baud rate to the user’s selection (made using the K3’s CONFIG:RS232 menu entry). " The question: Is there a way to change the K3s from RS-232 to USB programmatically? I want to do this for remote-control reasons. OF course, I know I'll lose connectivity via RS-232 once switched! I want the ability to switch from RRC1258 + K3/0 to a software-only remote. I know I can do this by using the COM1 port on the station RRC, but would like to do it programmatically as well. Has BR been extended in the K3s or is there no way to do this? (It would also be a great way to recover from a remote op accidentally switching RS-232 to USB on a K3/0 mini!) TIA CU all in Dayton, 73, Gerry Hull, *W1VE *Hancock, NH USA CWOps #191 | YCCC | CanAm Contest Coalition | Maritime Contest Club RadioSport Manitoba | ARRL | RAC | QCWA ARCluster dxc.w1ve.com | Telnet or telnet:7373 access | RBN direct feeds __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KPA1500, 4 years old, Intermittent LOW GAIN error.
Over the last couple of weeks, I have an intermittent problem with the amp. On a number of occasions, I have received a LOW GAIN error message. The output drops from 1400W to a few hundred watts or less as confirmed in the logging file and my external power meter The problem can go away for a few days and then return. Cycling the power has no effect, the intermittent may or may not return almost immediately. Has anybody experienced a similar problem? Thanks - Paul KW7Y __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA1500, 4 years old, Intermittent LOW GAIN error.
I had problems at one point due to the 3 watt resistor on the filter board desoldering itself causing the amp to have errors. The RF deck went back to Elecraft and Renee got it repaired. There were also a few hardware updates done while it was back for a visit in Watsonville. I don’t think that is related to your problem but you could take off the bottom cover and take a look if there is any obvious signs of trouble on the filter or PA board. Having the updates done to the RF deck made the amp 100% rock solid after that. 83 Dave wo2x Sent from my waxed string and tin cans. > On May 11, 2022, at 11:55 AM, p...@paulbaldock.com wrote: > > Over the last couple of weeks, I have an intermittent problem with the amp. > On a number of occasions, I have received a LOW GAIN error message. The > output drops from 1400W to a few hundred watts or less as confirmed in the > logging file and my external power meter The problem can go away for a few > days and then return. Cycling the power has no effect, the intermittent may > or may not return almost immediately. > > Has anybody experienced a similar problem? > > Thanks > > - Paul KW7Y > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rocke...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
It's showing up on the reflector. Kind of leading, no win question. But I'm a suckered. Been using 1/2 wave dipoles for 60 years. What is the question? On Wed, May 11, 2022, 5:06 PM Richard wrote: > I’m trying to send this to the reflector at large, but it keeps attaching > John’s name. Sorry, John. This will be my third try. > > Anybody out there super-well versed in the behavior of the half-wave > dipole? > > Cheers, > > Richard Kunc > W4KBX > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to radio.k...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] OT / FS: Tascam US-125M USB Mixer / Sound Card
Now that my K3/P3 combo has been sold and I have a shiny new K4D, I have no need for this Tascam sound card. I used it for years to run digital modes (JT65, JT9, FT8, PSK31) with the K3, a KX3, and a KX2. Works great! Included is the Tascam in the original box, a pair of audio cables (RCA connectors on the Tascam end; and Stereo TRS connectors on the radio end), and a USB A to B cable wrapped around a pair of 2.4” mix 31 ferrite cores to stop any pesky RF from getting into your computer. Asking $90 shipped free via USPS Priority Mail Flat Rate Box to any US address. PayPal, cash, or personal check. Jim Bennett / K7TXA @ ARRL.NET Eagle, ID __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA1500, 4 years old, Intermittent LOW GAIN error.
The idling current displays at 2A, but you have to be in operate. When the HIGH SWR error occurs the amp goes in to standby. Putting it back into operate after the error the idle current is again displayed as 2A, waiting for the next intermittent HIGH SWR failure. I hate intermittents. Thanks - Paul KW7Y -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Roy Sent: Wednesday, May 11, 2022 9:57 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500, 4 years old, Intermittent LOW GAIN error. Check your idling current -- should be stable at about 2 amps. 73, Roy K6XK > Over the last couple of weeks, I have an intermittent problem with the amp. > On a number of occasions, I have received a LOW GAIN error message. > The output drops from 1400W to a few hundred watts or less as > confirmed in the logging file and my external power meter The problem > can go away for a few days and then return. Cycling the power has no > effect, the intermittent may or may not return almost immediately. > > Has anybody experienced a similar problem? > > Thanks > > - Paul KW7Y > > _ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to p...@paulbaldock.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Antenna Quandary
Anybody out there super-well versed in the behavior of the half-wave dipole? Cheers, Richard Kunc W4KBX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Antenna Quandary
You're a lot less likely to get an answer to that question than you would the answer to whatever question you actually want answered. Dave AB7E On 5/11/2022 1:56 PM, Richard wrote: Anybody out there super-well versed in the behavior of the half-wave dipole? Cheers, Richard Kunc W4KBX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to ab7e...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA1500, 4 years old, Intermittent LOW GAIN error.
Check your idling current -- should be stable at about 2 amps. 73, Roy K6XK Over the last couple of weeks, I have an intermittent problem with the amp. On a number of occasions, I have received a LOW GAIN error message. The output drops from 1400W to a few hundred watts or less as confirmed in the logging file and my external power meter The problem can go away for a few days and then return. Cycling the power has no effect, the intermittent may or may not return almost immediately. Has anybody experienced a similar problem? Thanks - Paul KW7Y _ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Antenna Quandary
Anybody out there super-well versed in the behavior of the half-wave dipole? Cheers, Richard Kunc W4KBX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Antenna Quandary
I’m trying to send this to the reflector at large, but it keeps attaching John’s name. Sorry, John. This will be my third try. Anybody out there super-well versed in the behavior of the half-wave dipole? Cheers, Richard Kunc W4KBX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
